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lib/mpi: Add the return value check of kcalloc()
author
Zizhuang Deng
<sunsetdzz@gmail.com>
Thu, 30 Dec 2021 07:03:31 +0000
(15:03 +0800)
committer
Herbert Xu
<herbert@gondor.apana.org.au>
Fri, 7 Jan 2022 03:30:01 +0000
(14:30 +1100)
Add the return value check of kcalloc() to avoid potential
NULL ptr dereference.
Fixes:
a8ea8bdd9df9
("lib/mpi: Extend the MPI library")
Signed-off-by: Zizhuang Deng <sunsetdzz@gmail.com>
Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
lib/mpi/mpi-mod.c
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diff --git
a/lib/mpi/mpi-mod.c
b/lib/mpi/mpi-mod.c
index
47bc59e
..
54fcc01
100644
(file)
--- a/
lib/mpi/mpi-mod.c
+++ b/
lib/mpi/mpi-mod.c
@@
-40,6
+40,8
@@
mpi_barrett_t mpi_barrett_init(MPI m, int copy)
mpi_normalize(m);
ctx = kcalloc(1, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
if (copy) {
ctx->m = mpi_copy(m);